1 Features
1• Ensured Monotonicity to 12-Bits
• Low Power Operation: 156-μA Maximum at 3.3 V
• Extended Power Supply Range (2.7 V to 5.5 V)
• I2C-Compatible 2-Wire Interface Which Supports
Standard (100-kHz), Fast (400-kHz), and High-
Speed (3.4-MHz) Modes
• Rail-to-Rail Voltage Output
• Very Small Package
• Resolution: 12 bits
• INL: ±8 LSB (Maximum)
• DNL: 0.6 / –0.5 LSB (Maximum)
• Settling Time: 8.5 μs (Maximum)
• Zero Code Error: 10 mV (Maximum)
• Full-Scale Error: −0.7%FS (Maximum)
• Supply Power
– Normal: 380 μW (3 V) / 730 μW (5 V) (Typical)
– Power Down: 0.5 μW (3 V) / 0.9 μW (5 V)
(Typical)

2 Applications
• Industrial Process Control
• Portable Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Test Equipment

3 Description
The DAC121C081 is a 12-bit, single-channel,
voltage-output digital-to-analog converter (DAC) that
operates from a 2.7-V to 5.5-V supply. The output
amplifier allows rail-to-rail output swing and has an
8.5-μs settling time. The DAC121C081 uses the
supply voltage as the reference to provide the widest
dynamic output range, and typically consumes 132
μA while operating at 5 V. It is available in 6-pin SOT
and WSON packages, and provides three address
options (pin selectable).
As an alternative, the DAC121C085 provides nine I2C
addressing options and uses an external reference. It
has the same performance and settling time as the
DAC121C081, and is available in an 8-lead VSSOP.